The power switch and LED pins are often proprietary in Dell systems. If using a non-Dell case, you may need a Pinout Adapter or a multimeter to identify the power switch pins.
If the system fails to boot after a configuration change, use the Clear CMOS jumper located near the battery to reset settings to factory defaults. How to Get Official Documentation mih61r mb 100971 manual cracked
Note: Supporting 3rd-gen CPUs may require a specific BIOS version typically found in the OptiPlex 3010 variant. The power switch and LED pins are often